Vietnam's benchmark VN Index ended up 3 percent on Wednesday, its biggest jump in 15 months, after the government reassured it will maintain the country's economic growth target and keep the dollar/dong rate stable until the year-end.

Prime Minister Nguyen Tan Dung said Vietnam would not alter its targets for 2015, including economic growth, inflation, state budget expenditure or trade despite recent impacts from the global economy, according to a government statement issued late on Tuesday.